Alert archive / Nebraska / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 244, NWS Cheyenne, WY

July 15, 2019Cheyenne County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 15, 2019, 10:10 PM MDT for Cheyenne County, Nebraska. It was in force for 21 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 15, 2019, 10:10 PM MDT (04:10 UTC)
Expired: Jul 15, 2019, 10:31 PM MDT
In force: 21 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Cheyenne County, NE

The radar

The Cheyenne radar (KCYS), 152 km from the middle of the area, began a volume at 04:12 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 4.2 hours before the alert went out and 201 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1100 J/kg
Mixed-layer CIN: -125 J/kg
Mixed-layer LCL: 1864 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Cheyenne, WY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 15, 8:35 PM MDT, 1 hour 35 minutes earlier.

Area forecast discussion, Jul 15, 8:35 PM MDT, 1 hour 35 minutes before

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Hazardous weather outlook, Jul 15, 8:49 PM MDT, 1 hour 21 minutes before

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In the hours before

Special weather statement, Jul 15, 7:45 PM MDT, 2 hours 25 minutes before

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Local storm report, Jul 15, 8:43 PM MDT, 1 hour 27 minutes before

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Special weather statement, Jul 15, 9:37 PM MDT, 33 minutes before

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Special weather statement, Jul 15, 9:52 PM MDT, 18 minutes before

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Special weather statement, Jul 15, 9:54 PM MDT, 16 minutes before

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Special weather statement, Jul 15, 9:57 PM MDT, 13 minutes before

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The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 15, 6:01 PM MDT	Special Weather Statement	CYS	Goshen	29 min
Jul 15, 6:14 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	31 min
Jul 15, 6:29 PM MDT	Special Weather Statement	CYS	Niobrara	31 min
Jul 16, 1:29 PM MDT	Special Weather Statement	CYS	Goshen	61 min
Jul 16, 2:08 PM MDT	Special Weather Statement	CYS	Laramie	67 min
Jul 16, 3:08 PM MDT	Special Weather Statement	CYS	Laramie	52 min
Jul 16, 3:18 PM MDT	Special Weather Statement	CYS	Niobrara	42 min
Jul 16, 3:33 PM MDT	Special Weather Statement	CYS	Goshen	42 min
Jul 16, 3:39 PM MDT	Special Weather Statement	CYS	Platte	51 min
Jul 16, 3:49 PM MDT	Special Weather Statement	CYS	Laramie	41 min
Jul 16, 4:01 PM MDT	Special Weather Statement	CYS	Platte	44 min
Jul 16, 4:19 PM MDT	Special Weather Statement	CYS	Niobrara	41 min
Jul 16, 4:29 PM MDT	Severe Thunderstorm Warning	CYS	Converse, Niobrara	31 min
Jul 16, 4:41 PM MDT	Special Weather Statement	CYS	Niobrara	34 min
Jul 16, 4:56 PM MDT	Severe Thunderstorm Warning	CYS	Converse, Niobrara	33 min
Jul 16, 4:59 PM MDT	Special Weather Statement	CYS	Converse	31 min
Jul 16, 5:02 PM MDT	Special Weather Statement	CYS	Niobrara	28 min
Jul 16, 5:21 PM MDT	Special Weather Statement	CYS	Niobrara	24 min
Jul 16, 5:25 PM MDT	Severe Thunderstorm Warning	CYS	Niobrara	35 min
Jul 16, 5:45 PM MDT	Special Weather Statement	CYS	Niobrara	30 min
Jul 15, 6:16 PM MDT	Severe Thunderstorm Warning	CYS	Scotts Bluff	29 min
Jul 15, 6:25 PM MDT	Special Weather Statement	CYS	Sioux	35 min
Jul 15, 6:42 PM MDT	Special Weather Statement	CYS	Scotts Bluff	33 min
Jul 15, 6:43 PM MDT	Severe Thunderstorm Warning	CYS	Morrill, Scotts Bluff	19 min
Jul 15, 6:57 PM MDT	Special Weather Statement	CYS	Dawes	33 min
Jul 15, 7:12 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	33 min
Jul 15, 7:44 PM MDT	Special Weather Statement	CYS	Dawes	31 min
Jul 15, 7:45 PM MDT	Special Weather Statement	CYS	Box Butte	30 min
Jul 15, 9:37 PM MDT	Special Weather Statement	CYS	Cheyenne	38 min
Jul 15, 9:52 PM MDT	Special Weather Statement	CYS	Box Butte	38 min
Jul 15, 9:54 PM MDT	Special Weather Statement	CYS	Morrill	21 min
Jul 15, 9:57 PM MDT	Special Weather Statement	CYS	Cheyenne	33 min
Jul 16, 3:12 PM MDT	Special Weather Statement	CYS	Scotts Bluff	48 min
Jul 16, 4:14 PM MDT	Special Weather Statement	CYS	Scotts Bluff	46 min
Jul 16, 4:15 PM MDT	Special Weather Statement	CYS	Kimball	45 min
Jul 16, 4:58 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Box Butte, Morrill, Scotts Bluff	32 min
Jul 16, 5:28 PM MDT	Severe Thunderstorm Warning	CYS	Morrill	32 min
Jul 16, 5:56 PM MDT	Special Weather Statement	CYS	Morrill	49 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2019 Every severe thunderstorm warning in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.